Binary Metal-Carbon Phase-Transition Temperatures

Published

February 29, 2024

Author(s)

Donald R. Burgess Jr.

Abstract

In this work, we compiled and evaluated eutectic and peritectic phase-transition temperatures for metal-carbon (e.g., Co-C, Re-C) and metal carbide-carbon compounds (e.g., Fe3C-C, HfC2-C) and selected recommended values for possible future use on the International Temperature Scale as primary or secondary fixed points. All these phase-transition temperatures are at high temperatures (1400 K to 3000 K) above the ITS-90 temperature scale, where the highest fixed point is the freezing point of copper (1357.77 K). The selected systems include 18 phase-transition temperatures: eight of these have very low uncertainties (0.12 K to 0.27 K) that likely will become primary fixed points on the International Temperature Scale, while ten of these have slightly higher uncertainties (0.4 K to 2.5 K) that may become secondary fixed points. Phase transitions for all other metal-carbon systems with higher uncertainties are also provided for completeness.

Citation

Technical Note (NIST TN) - 2278

Report Number

2278

NIST Pub Series

Technical Note (NIST TN)

Pub Type

NIST Pubs

Download Paper

https://doi.org/10.6028/NIST.TN.2278

Local Download

Keywords

Metal-carbon, Phase-transitions, Temperatures, Critical evaluation

Citation

Burgess Jr., D. (2024), Binary Metal-Carbon Phase-Transition Temperatures, Technical Note (NIST TN), National Institute of Standards and Technology, Gaithersburg, MD, [online], https://doi.org/10.6028/NIST.TN.2278, https://tsapps.nist.gov/publication/get_pdf.cfm?pub_id=956936 (Accessed October 9, 2025)